No files

is this with the built in memory or the sd card?? if its built in then you may have a firmware problem or while you were on the puter you got messing around with files and switched around a few?? ok maybe not . I ask cause i've done it myself and scewed my unit up and the only way I was able to fix it was contact the company and they gave me some software to load and it was all better If you can contact the manufacturer of this unit Im sure they would be able to assist you as I cant really say without hooking up the unit and analizing the data I get back from it.. Well good luck to ya.